JP2007055368A - Reinforcing member for cab, cab, and working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cab reinforcing member capable of reinforcing certainly the cab body with respective to a lateral load while the operator's field of view is well secured. <P>SOLUTION: In the condition that the cab reinforcing member 12 is mounted on the cab body 11, supports 58 and 59 arranged in the direction crossing the body 57 of the reinforcing member are installed at the two ends of the body 57 of the reinforcing member positioned along the rear edge of a skylight 48 in the ceiling part 20. Thereby the strength of the ceiling part 20 of the cab body 11 can be enhanced in the neighborhood of the rear of the skylight 48 while the operator's field of view is well secured, and it is possible to reinforce the cab body 11 certainly against a lateral load. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reinforcing member for a cab that is attached to a box-shaped cab body located on the side of a working device, a cab having the cab, and a work machine including the cab.

  Conventionally, this type of cab mounted on the side of a work apparatus in a machine body of a work machine such as a hydraulic excavator has a box-shaped cab body, and the cab body is formed from both sides of the front portion of the floor surface portion. A front cross member is provided between the lower parts of the left and right front pillars that rise, and a front header is provided between the upper parts. The front pillars are opened on the front side by these front pillars, front cross members, and front headers. Is formed.

  Further, the upper ends of the front pillars are bent rearward to form left and right side portions, and the rear end portions of these side portions are connected to the upper end portions of the left and right rear pillars rising from both sides of the rear portion of the floor surface portion, A roof panel is integrally provided at the rear part of each front pillar, and a skylight is formed at the front side of the cab body between the rear part of the front header and the front part of the roof panel.

  By the way, a hydraulic excavator or the like may inevitably work on rough terrain or an inclined land. When working on such a place, the hydraulic excavator may fall down due to some accident.

  In order to protect the operator against such a fall, it is necessary to reinforce a cab such as a hydraulic excavator or improve the rigidity of the cab.

  However, in a cab such as a hydraulic excavator, it is desirable to take the area of each window as large as possible in consideration of the field of view of the operator, while the roof panel of the cab body formed of a single plate is If the skylight is made large, the strength may decrease.

Therefore, a configuration is known in which a cab reinforcing member is attached to the cab body to improve the strength of the cab body. In such a cab reinforcing member, both end portions of a rod-shaped reinforcing member main body are fixed to fixed portions at both side portions of the front header (see, for example, Patent Document 1).
JP 2001-279721 A (page 4-6, FIG. 3)

  In the above-described cab reinforcing member, since the cab reinforcing member is located on the upper front side of the cab body, the strength on the front side can be improved with respect to the side load applied to the cab body, but the front and rear center parts of the ceiling part There is a problem that the nearby reinforcement is not sufficient.

  The present invention has been made in view of the above points, and a cab reinforcing member capable of reliably reinforcing a cab body against a lateral load while ensuring the visibility of an operator, a cab having the cab, and a work including the cab The purpose is to provide a machine.

  The invention according to claim 1 is a reinforcing member for a cab that is attached to a box-shaped cab body that is located on the side of the working device and has an opening at the front portion of the ceiling portion, and is attached to the cab body. A reinforcing member body that is positioned along the rear edge of the window and whose both ends are fixed to the ceiling, and is provided at both ends of the reinforcing member body in a direction intersecting the reinforcing member body, And a support portion attached to the main body.

  According to a second aspect of the present invention, in the reinforcing member for a cab according to the first aspect, each support portion has a front side extending along the window portion to the front side surface portion of the cab body, and the support portion on the working device side. Is extended to the front side of the support part on the opposite side.

  The invention according to claim 3 is the reinforcing member for a cab according to claim 1 or 2, wherein the cab reinforcing member is provided integrally with each support portion, and at least a part of both side edge portions on the front side of the window portion when attached to the cab body. And fixed portions that are fixed to the cab body and connected to the front edge portion of the window portion in a state of being attached to the cab body.

  The invention according to claim 4 is a box-shaped cab body located on the side of the working device and having a window on the ceiling, and a cab reinforcing member attached to the cab body. It is a cab equipped with.

  The invention according to claim 5 comprises a machine body, a working device operably provided on the machine body, and a cab according to claim 4 mounted on the machine body at a side of the working device. It is a work machine.

  According to the first aspect of the present invention, the reinforcing member main body is attached to both ends of the reinforcing member main body located along the rear edge of the window portion opened to the front side of the ceiling portion in a state of being attached to the cab main body. By providing a support part in the crossing direction, it is possible to improve the strength of the ceiling part of the cab body near the rear side of the window part while ensuring the operator's field of view, and to reliably reinforce the cab body against side loads it can.

  According to the invention described in claim 2, by extending the front side of the support portion along the window portion to the front side surface portion of the cab body, the cab body can be more reliably reinforced against a side load, By extending the support part on the work equipment side to the front side of the support part on the opposite side, when the operator interferes with the work equipment due to deformation of the cab body within a range that can protect the operator while securing the operator's field of view However, the support unit on the working device side acts as a cab body protection member.

  According to the third aspect of the present invention, at least a part of the fixed portion integrally provided in each support portion is fixed to both side edge portions on the front side of the window portion while being attached to the cab body. In addition, the connecting portion that connects between these fixed portions is fixed to the front edge portion of the window portion, so that the fixed portion and the connecting portion do not cover the window portion, the operator's field of view can be secured, and As a whole, the frame structure makes it possible to improve the strength of the ceiling portion of the cab body even on the front side of the window portion, and the cab body can be more reliably reinforced against side loads.

  According to invention of Claim 4, reliability can be improved because the cab main body can be reliably reinforced with respect to a side load with the reinforcement member for cabs.

  According to invention of Claim 5, the area | region which can be work | worked can be expanded by providing the cab which reinforced the cab main body with respect to the side load reliably with the reinforcement member for cabs.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

  FIG. 4 shows a hydraulic excavator 1 as a working machine. The hydraulic excavator 1 has a machine main body 5 in which an upper swing body 4 is turnably provided on an upper portion of a lower traveling body 2 via a swing portion 3. A cab 6 that surrounds the operator's operating space is mounted on the upper left side of the upper side of the upper swing body 4, and a work device 7 projects from the center of the front portion of the upper swing body 4 so as to be operable. That is, the cab 6 is located on the side of the work device 7.

  As shown in FIGS. 1 and 3, the cab 6 includes a box-shaped cab main body 11 and a cab reinforcing member 12 that is detachably attached to the cab main body 11.

  The cab body 11 is mounted on the revolving frame of the upper revolving structure 4 (FIG. 4) via a mounting member (not shown), and has a substantially rectangular floor surface portion 15 which is long before and after the left and right and left side portions of the floor surface portion 15. Provided on the left side 16 and the right side 17 rising upward, the front side 18 and the rear side 19 rising upward from the front and rear ends of the floor 15, and above the side parts 16, 17, 18, 19. The ceiling part 20 is provided.

  The cab body 11 includes a left front pillar 22, a right front pillar 23, a left rear pillar 24, and a right rear pillar 25 as columnar bodies provided at four corners of the floor 15. Furthermore, the upper end portion of the left front pillar 22 is bent to the upper end portion of the left rear pillar 24 to form the left side portion 26, and the upper end portion of the right front pillar 23 is bent to the upper end portion of the right rear pillar 25. A right side portion 27 is formed, the upper ends of both front pillars 22 and 23 are connected by a front header 28, the upper ends of both rear pillars 24 and 25 are connected by a rear header 29, and both front pillars 22 are connected. , 23 are connected by a front cross member 30, and the lower ends of both rear pillars 24, 25 are connected by a rear cross member 31.

  On the floor 15, although not shown, a seat on which the operator sits, a console operated by the operator, and the like are appropriately arranged. The floor 15 is provided with a hole (not shown) through which various wires and pipes connected to a console and the like are led out to the lower outside of the cab body 11.

  The left side surface portion 16 is defined by a left front pillar 22, a left side portion 26, and a left rear pillar 24, and a columnar body having an upper end connected to the left side portion 26 between the left front pillar 22 and the left rear pillar 24. A door mounting pillar 32 is disposed, and a door 33 that is opened and closed when the operator gets in and out of the cab body 11 is provided between the door mounting pillar 32 and the left front pillar 22. In addition, a left side panel 34 is integrally provided between the door mounting pillar 32 and the left rear pillar 24. A left window 35 adjacent to the rear of the door 33 is formed in the upper part of the left side panel 34. The left window 35 is closed by a translucent member not shown.

  The right side portion 17 is partitioned by a right front pillar 23, a right side portion 27, and a right rear pillar 25, and a right side panel 36 is integrally provided between the lower portions of the right front pillar 23 and the right rear pillar 25. In the upper part of the panel 36, a right window 37 is formed. The right window 37 is closed by a translucent member (not shown).

  The front side surface portion 18 is partitioned by the front pillars 22 and 23, the front header 28, and the front cross member 30, and a front window 41 is formed in the whole. The front window 41 is closed by a light-transmitting member (not shown). Has been.

  The rear side surface portion 19 is partitioned by both rear pillars 24, 25 and a rear header 29, and a rear panel 43 formed of, for example, a single plate is integrally provided between the lower portions of the rear pillars 24, 25 and the upper portion of the rear cross member 31. A rear window 44 is formed in the upper portion of the rear panel 43. The rear window 44 is formed in a quadrangular shape and can be opened and closed by a translucent member (not shown).

  Here, a hat member H, which is a steel material as a mounting member, is welded to the inside of the front cross member 30 and the lower end portions of the panels 34, 36, 43, and these hat members H are bolts not shown on the floor portion 15. The side surface portions 16, 17, 18, and 19 are integrated with the floor surface portion 15 by being fixed via the.

  The ceiling portion 20 is partitioned by both headers 28 and 29 and both side portions 26 and 27, and a roof panel 47 formed of, for example, a single plate is fitted to the rear side, and the rear side is formed in a substantially flat shape. In addition, a skylight 48 as a window portion is formed in front of the roof panel 47. The skylight 48 is formed in a rectangular shape and can be opened and closed by a door body (not shown).

  The front pillars 22 and 23 are also called A pillars, the door mounting pillars 32 are also called B pillars, and the rear pillars 24 and 25 are also called C pillars. 22, 23, 24, 25, 32 are each a deformed steel pipe formed of a steel plate.

  The side portions 26 and 27 are formed in a substantially horizontal shape, and bosses 53 and 54 for attaching the cab reinforcing member 12 to the cab main body 11 as shown in FIG. ing.

  On the other hand, the cab reinforcing member 12 prevents deformation of the cab body 11 as indicated by an imaginary line C when a lateral load F is applied to the cab 6, and is formed of a metal such as steel. As shown in FIG. 2, the reinforcing member main body 57 that is linear in the left-right direction is provided, and the both ends of the reinforcing member main body 57 are linear along the front-rear direction, which is a direction intersecting the reinforcing member main body 57. The support portions 58 and 59 are integrally welded. For this reason, the reinforcing member 12 for cab is formed in the substantially H shape by planar view.

  Reinforcing plates 61, 62, 63, and 64, which are reinforcing plates, are welded to the connecting portions of both ends of the reinforcing member main body 57 and the support portions 58 and 59, respectively. As a result, the cab reinforcing member 12 is formed to be substantially line symmetrical in the left-right direction.

  The reinforcing member body 57 has a length dimension substantially equal to the width dimension of the ceiling portion 20. The reinforcing member main body 57 is disposed along the front edge of the roof panel 47, which is the rear edge of the skylight 48, with the cab reinforcing member 12 attached to the cab main body 11. Is spaced above.

  In the support portions 58 and 59, the reinforcing member main body 57 is connected to a substantially central portion in the front-rear direction. In other words, the support portions 58 and 59 protrude by substantially equal dimensions on the front side and the rear side of the reinforcing member main body 57, respectively. For this reason, the support portions 58 and 59 are spaced apart from the outer sides of the side portions 26 and 27 with the cab reinforcing member 12 attached to the cab body 11, and the front side is located along both sides of the skylight 48. The rear side is located along both sides of the roof panel 47.

  The reinforcing plates 61, 62, 63 and 64 reinforce the welding between the reinforcing member main body 57 and the support portions 58 and 59, and have two sides sandwiching a right angle between the reinforcing member main body 57 and the support portions 58 and 59, respectively. It is formed in a substantially right triangle shape. Further, these reinforcing plates 61, 62, 63, 64 are formed so as not to block the opening of the skylight 48 in a state where the cab reinforcing member 12 is attached to the cab body 11.

  The reinforcing plates 61 and 63 are respectively provided with insertion holes 66 and 67 corresponding to the bosses 53 and 54 (FIG. 3) protruding from the side portions 26 and 27, respectively. , 67, bolts 68, 69 are inserted when the cab reinforcing member 12 is attached and screwed to the bosses 53, 54 (FIG. 3), respectively.

  Next, the function and effect of the first embodiment will be described.

  When the hydraulic excavator 1 (FIG. 4) inevitably works on rough terrain or slopes, the cab reinforcing member 12 is attached to the cab body 11.

  At this time, the insertion holes 66 and 67 of the reinforcing plates 61 and 63 are aligned with the bosses 53 and 54 (FIG. 3) projecting from both side parts 26 and 27 of the ceiling part 20 of the cab body 11, and these insertion holes Reinforcing member main body 57 is positioned in the left and right direction along the rear edge of skylight 48 by inserting bolts 68 and 69 into 66 and 67, respectively, and at both ends of reinforcing member main body 57, Support portions 58 and 59 are positioned in the front-rear direction intersecting with the reinforcing member main body 57.

  In other words, the ceiling portion 20 of the cab body 11 is not easy to ensure the strength of the side portions 26 and 27 because the roof panel 47 is formed of a single plate and the skylight 48 is opened. When the cab reinforcing member 12 is configured and attached to the cab main body 11 as described above, the strength of the ceiling portion 20 of the cab main body 11 is increased in the vicinity of the rear side of the skylight 48, particularly in the vicinity of the front and rear central portion of the cab main body 11. Therefore, the cab body 11 can be reliably reinforced against the side load F.

  Further, since the cab reinforcing member 12 does not block the skylight 48, it does not block the operator's upper view.

  Moreover, since the back of the skylight 48 of the ceiling portion 20 is formed in a flat shape by the roof panel 47 or the like, the cab reinforcing member 12 can be easily attached.

  Further, since the front end portions of the support portions 58 and 59 are located on both sides of the skylight 48, the side portions 26 and 27 on both sides of the skylight 48 can be reliably reinforced and protected by the support portions 58 and 59.

  And since the cab main body 11 can be reliably reinforced with respect to the side load F especially in the vicinity of the front and rear central portions as in the first embodiment, the reliability of the cab 6 can be improved. 6 is mounted on the hydraulic excavator 1, for example, even when a side load F of the cab body 11 is applied as shown in FIG. The operator can be surely protected and the working area can be expanded.

  Further, by making the cab reinforcing member 12 detachable from the cab main body 11, the cab reinforcing member 12 can be attached to the cab main body 11 only when necessary, and can be used with respect to the lateral load F of the cab main body 11. The intensity can be selected.

  Next, a second embodiment will be described based on FIG. 5 and FIG. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this second embodiment, the front sides of the support portions 58 and 59 of the cab reinforcing member 12 of the first embodiment are arranged along the front pillars 22 and 23, and the front header of the front side surface portion 18 is provided. It extends to the front of 28 and is substantially U-shaped in plan view.

  That is, the support portion 58 includes a left straight portion 71 that is linear in the front-rear direction from the left side of the roof panel 47 to the front end portion of the left side portion 26 of the left front pillar 22, and the front end portion of the left straight portion 71. It has a left curved portion 72 that is curved downward along the left front pillar 22, and a left fixing plate 73 is welded to the inner side.

  The left curved portion 72 has a tip portion located on the left side of the front header 28.

  The left fixed plate 73 includes a substantially horizontal left horizontal plate portion 76 located inside the left straight portion 71, and a straight line extending downward from the front end portion of the left horizontal plate portion 76. And a left front plate 77 located inside.

  Insertion holes 81 and 82 are formed in the vicinity of the rear end portion of the left horizontal plate portion 76 and in the vicinity of the lower end portion of the left front plate portion 77, respectively. Bolts 83 and 84 are respectively inserted into the insertion holes 81 and 82 when the cab reinforcing member 12 is attached to the cab body 11, and these bolts 83 and 84 protrude upward from the front end portion of the left side portion 26. The boss 85 provided and the boss 86 projecting from the left end of the left front pillar 22 and the left side of the front header 28 to the front of the left front pillar 22 are respectively screwed.

  On the other hand, the support portion 59 has a right straight portion 91 that is linear in the front-rear direction from the right side of the roof panel 47 to the front end portion of the right side portion 27, and from the front end portion of the right straight portion 91 to the right front pillar 23. And a right fixed plate 93 is welded to the inner side.

  The right curved portion 92 has a distal end portion extending below the left curved portion 72 along the right front pillar 23, and is positioned below the right side of the front header 28. That is, the right bending portion 92 has a larger amount of forward extension than the left bending portion 72.

  The right fixing plate 93 includes a substantially horizontal right horizontal plate portion 94 positioned inside the right straight portion 91, and a straight line extending downward from the front end portion of the right horizontal plate portion 94. A right front plate portion 95 located on the inner side, a right extension plate portion 96 linearly extending downward from the lower end portion of the right front plate portion 95 and positioned on the inner side of the right curved portion 92, and the right extension plate A right distal end plate portion 97 linearly extending downward from the lower end portion of the portion 96 and positioned inside the right curved portion 92.

  Insertion holes 101, 102, and 103 are formed in the vicinity of the rear end portion of the right horizontal plate portion 94, in the vicinity of the lower end portion of the right front plate portion 95, and in the vicinity of the lower end portion of the right front end plate portion 97, respectively. Bolts 105, 106, and 107 are inserted into the insertion holes 101, 102, and 103 when the cab reinforcing member 12 is attached to the cab body 11, and these bolts 105, 106, and 107 are inserted into the right side portion 27. A boss 108 protruding upward from the front end, a boss 109 protruding from the right end of the right front pillar 23 and the right side of the front header 28 to the front of the right front pillar 23, and below this boss 109 Each is screwed to a boss 110 protruding in front of the right front pillar 23.

  When the cab reinforcing member 12 is attached to the cab body 11, the insertion holes 66 and 67 of the reinforcing plates 61 and 63 are inserted into the bosses 53 projecting from both side portions 26 and 27 of the ceiling portion 20 of the cab body 11. , 54 (FIG. 3), bolts 68, 69 are inserted into the insertion holes 66, 67 and screwed, and the insertion holes 81, 82 and the insertion holes 101, 102, 103 are respectively connected. Align with bosses 85 and 86 and bosses 108, 109 and 110, insert bolts 83 and 84 and bolts 105, 106 and 107 into these insertion holes 81 and 82 and insertion holes 101, 102 and 103, respectively. Thus, the cab reinforcing member 12 is fixed to the cab body 11.

  As a result, by extending the front side of the support portions 58 and 59 to the front side surface portion 18 of the cab main body 11, the cab main body 11 can be more reliably reinforced against the side load F (FIG. 3). By extending the right curved portion 92 of the support portion 59 on the device 7 side to the front side of the left curved portion 72 of the support portion 58, the cab body 11 is subjected to the working device 7 (FIG. 3) by the lateral load F (FIG. 3). 4) Even when it deforms and interferes within the range that can protect the operator, the support portion 59 acts as a protective member for the cab body 11, and the operator can be reliably protected.

  In the second embodiment, the shape of the fixing plates 73 and 93 is not limited to the above configuration as long as the curved portions 72 and 92 can be fixed to the front pillars 22 and 23, respectively.

  Next, a third embodiment will be described based on FIG. 7 and FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, instead of the fixing plates 73 and 93 of the second embodiment, the fixed portions 115 and 116 are integrally welded to the support portions 58 and 59, respectively. The fixed portions 115 and 116 are connected to each other, a linear connecting portion 117 is provided in the left-right direction, and the cab reinforcing member 12 has a frame structure.

  That is, the fixed portion 115 is formed by, for example, pressing a steel plate into a vertically long box shape, and an upper end portion is located at a curved portion at an upper end portion of the left front pillar 22 that is a front end portion of the left side portion 26, and a lower end. The portion protrudes downward along the left front pillar 22 from the lower end portion of the left curved portion 72.

  Further, the fixed portion 115 includes an upper end portion located inside the front end portion of the left side portion 26, an intermediate portion located at a curved portion of the left front pillar 22 on the left side of the front header 28, and a left front pillar. Bolt insertion holes 121, 122, and 123 are formed at respective positions with the lower end portion located on the front side surface portion 18 side of 22. Bolts 124, 125, 126 are inserted into the bolt insertion holes 121, 122, 123 when the cab reinforcing member 12 is attached to the cab body 11, and these bolts 124, 125, 126 are inserted into the front end of the left side portion 26. A boss (not shown) that protrudes upward from the upper part, a boss (not shown) that protrudes from the left end of the left front pillar 22 and the left side of the front header 28 to the front of the left front pillar 22, and a lower part of the boss. Each is screwed to a boss (not shown) protruding in front of the left front pillar 22.

  The fixed part 116 is formed by, for example, pressing a steel plate into a vertically long box shape that is line-symmetric with the fixed part 115, and has an upper end at the curved part at the upper end part of the right front pillar 23 that is the front end part of the right side part 26. Is located, and the entire right side is welded to the right curved portion 92.

  Further, the fixed portion 116 includes an upper end portion located inside the front end portion of the right side portion 27, an intermediate portion located at a curved portion of the right front pillar 23 that is on the right side of the front header 28, and a right front pillar. Bolt insertion holes 131, 132, and 133 are formed at respective positions with respect to the lower end portion located on the front side surface portion 18 side of 23. Bolts 134, 135, and 136 are inserted into the bolt insertion holes 131, 132, and 133 when the cab reinforcing member 12 is attached to the cab body 11, and these bolts 134, 135, and 136 are inserted into the front end of the right side portion 27. A boss (not shown) projecting upward from the upper part, a boss (not shown) projecting in front of the right front pillar 23 from the right side of the front header 28 and the upper end of the right front pillar 23, and below this boss Each is screwed to a boss (not shown) protruding in front of the right front pillar 23.

  On the other hand, both ends of the connecting portion 117 are welded to the fixed portions 115 and 116, respectively, and the cab reinforcing member 12 is attached to the cab body 11, and is located on the front side of the front header 28. The connecting portion 117 has a pair of bolt insertion holes 141 and 142. Bolts 144 and 145 are inserted into the bolt insertion holes 141 and 142 when the cab reinforcing member 12 is attached to the cab body 11, and these bolts 144 and 145 project from the front surface of the front header 28 and are not shown. Screwed onto the boss.

  When the cab reinforcing member 12 is attached to the cab body 11, the insertion holes 66 and 67 of the reinforcing plates 61 and 63 are inserted into the bosses 53 projecting from both side portions 26 and 27 of the ceiling portion 20 of the cab body 11. , 54 (FIG. 3), bolts 68, 69 are inserted into these insertion holes 66, 67 and screwed, respectively, and each bolt insertion hole 121, 122, 123 and each bolt insertion hole 131, 132 are inserted. , 133 are aligned with the bosses of the front pillars 22, 23, respectively, and the bolts 124, 125, 126 and the bolts 134, 135, respectively are inserted into the bolt insertion holes 121, 122, 123 and the bolt insertion holes 131, 132, 133, respectively. 136 is inserted and screwed, and bolts 144 and 145 are inserted into the bolt insertion holes 141 and 142 and screwed into the bosses of the front header 28, whereby the cab reinforcing member 12 is fixed to the cab body 11. The

  As a result, the fixed portions 115 and 116 integrally provided on the support portions 58 and 59 are respectively fixed to both side edges on the front side of the skylight 48, and the fixed portions 115 and 116 are connected to each other. Since the portion 117 is fixed to the front edge of the skylight 48, the fixed portions 115 and 116 and the connecting portion 117 do not cover the skylight 48, and the operator's field of view can be secured, and the cab reinforcing member 12 as a whole As a result, the strength of the ceiling portion 20 of the cab body 11 can be improved even on the front side of the skylight 48, and the cab body 11 can be more reliably reinforced against the lateral load F (FIG. 3).

  In the third embodiment, the shapes of the fixed portions 115 and 116 and the connecting portion 117 are not limited to the above configuration.

  In each of the above embodiments, the cab reinforcing member 12 may be attached in advance so that it cannot be removed from the cab body 11.

  Further, the cab 6 can be applied to any work machine other than the hydraulic excavator 1.

1 is a perspective view showing a first embodiment of a cab according to the present invention. It is a perspective view which shows the reinforcement member for cabs of a cab same as the above. It is a front view which shows a cab same as the above. It is a side view which shows the working machine provided with the cab same as the above. It is a perspective view which shows 2nd Embodiment of the cab which concerns on this invention. It is a perspective view which shows the reinforcement member for cabs of a cab same as the above. It is a perspective view which shows 3rd Embodiment of the cab which concerns on this invention. It is a perspective view which shows the reinforcement member for cabs of a cab same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavator as a working machine 5 Machine main body 6 Cab 7 Working device
11 Cab body
12 Reinforcing member for cab
18 Front side
20 Ceiling
48 Skylight as a window
57 Reinforcement body
58 Support Department
59 Support Department
115,116 Fixed part
117 Connection

Claims (5)

A cab reinforcing member that is attached to a box-shaped cab body that is located on the side of the working device and has an opening at the front of the ceiling,
A reinforcing member body that is positioned along the rear edge of the window portion in a state of being attached to the cab body, and whose both ends are fixed to the ceiling portion,
A reinforcing member for a cab, comprising: a support portion provided at both ends of the reinforcing member body in a direction intersecting the reinforcing member body and attached to the cab body. Each support part has its front side extended along the window part to the front side part of the cab body, and the work unit side support part is extended to the front side rather than the opposite side support part. The cab reinforcing member according to claim 1. A fixed portion that is provided integrally with each support portion and that is fixed to both side edges on the front side of the window portion in a state of being attached to the cab body;
The cab reinforcing member according to claim 1 or 2, further comprising a connecting portion that connects the fixed portions and is fixed to the front edge portion of the window portion in a state of being attached to the cab body. A box-shaped cab body located on the side of the working device and having a window on the ceiling;
A cab reinforcing member according to any one of claims 1 to 3 attached to the cab body. The machine body,
A working device operably provided in the machine body;
A work machine comprising: the cab according to claim 4 mounted on a machine body at a side of the work device.

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